VRLA, GEL and AGM Batteries (Lead-acid)
Regeneration Guide
The other Lead-acid technologies are mainly:
- The sealed valve regulated batteries (VRLA) for small autonomous systems (alarms, computer UPS, etc.)
- The GEL batteries have a gel electrolyte reinforced against heat and discharge
- The AGM batteries have an electrolyte enclosed in absorbent glass mat that still improves the quality of GEL batteries.
These batteries also know sulfation because of their exploitation:
- as stationary batteries (secured supply) they stay inactive
- as traction batteries (autonomous supply) they get frequently discharged
- as starter batteries they are exposed to climate variations and especially to heat.
Indicative success rate in recovering aged batteries with Bat4life
| Quality and battery age | <3 years |
from 3 to 7 years | > 7years |
| VRLA Batterie (traction & stationary) | 80% | 60% | 40% |
| GEL Batterie (traction & stationary) | 80% | 70% | 60% |
| GEL Batterie (starter) | 80% | 50% | 40% |
| AGM Batterie (traction & stationary) | 90% | 90% | 70% |
User Guide
- Recharge the battery at its maximum
- Apply Bat4life during 1 hour per 5 Ah of capacity
- Don't overtake 10 hours per 5 Ah of capacity
- Examples :
- VRLA 1,2 Ah : 15' up to 2 hours max
- VRLA 7 Ah : 1 hour up to 10 hours max
- GEL 12 Ah : 3 hours up to 2 days max
- AGM 80 Ah : 16 hours up to 7 days.